Device for use in the manufacture of piston rings



G. S PANN. I DEVICE FOR USE IN THE MANUFACTURE OF PISTON RINGS- APPLICATION FILED OCT. 26 I920.

Patented. Apr. 25; 1922.

v3 SHEETS-SHEET I.

Y Y I INVENTOR.

G. SPANN. DEVICE FOR use In THE MANUFACTURE or msrou muss.

APPLICATION FILED OCT. 26. I920. I 1 ,41 3,623. Patented Apr. 25, 1922.

3 sHEfs-sHEET 2.

e. SPANN. DEWCE FQR USE |N THE MANUFACTURE OF PISTON RINGS- APPLICATION FILED OCT. 26, 1920.

Patented Apr. 25, 1922.

3 SHEETS-SHEET 3- A TTORNE Y.

' are cut. Figure 11 is a perspectivevlew of? the upper part of Figure 1, with' the gage The device is preferably madein'the form of a standard which can haplecedfinmilling To all whom it may concern/f GEORGE SPANN, or NEWA K,- NEwJEnsnY.

nnvIo non, use IN THE-MANUFACTURE or PISTON RINGS.

Beit known that I, Gnoncn Sra viv, a citizen of the United States, and a resident [of Newark, county of Essex," and State off New Jersey, have invented certain new and useful Improvements in Devices for Use in the Manufacture of Piston Rings, of which the following is a specification. V

V This invention relates to an improved jig or clamp for use in the manufacture of piston rings, the clamp being constructedto hold the ring so that suitable cutters or milling tools can be used on both ends of the ring simultaneously, if desired, sothat the joint at the two ends' of the rings can be finished,

in onevop'eration. I :7 v The inventlon PIOVIClGS-tt clamp'of this k nd 1n wh1ch a gage'is 'emboched, which gage spaces the ends of the ring circumferentially, and whileso gaged" the ring is clamped to force and hold the'spaced ends out of alignment so that cutters mounted on an arbor. or shaft canlbe forced I simultaneously through the ends of the ri'ng'to form a joint, preferably atongueand groove joint. The invention also residesin certain deitails fof constructionwhich are full'ydescribed further on in this specification and also embodied in the claims. I The invention is illustrated in the accompanying drawings, in Wlli(il1 FlgL1Ife:1"lS a face view of the rear sideof the device withv a plate or j aw on the back removed. Figure 2 is a similar view with the plate in placef Figure 3 is a viewjsimilar to FigureQwith the gage withdrawn and the cutters con'lpleting their'cutting. Figure L is a detail section on line 4-4- in Figure 3. Figure 5 is a detailperspective view of the gage, and

Figure 6 is a detail view of the top part of the rear plate orijaw, Figure 7 showsthe ends of the ring against the gage, and Figure 8 is a side viewof the top part of the device. Figure 9 is a top view showing'the cutters and the ends of the, ring when thecutting is completed, and Figure 10 isa view of the ends of the ring fittedtogether after they and cutters; omitted.

machines and the like, but its niove'mentand relation to such machinery is .notfincluded in this description ventlon. I

as it is no part ofthis in- Specification of Ide'ttersrlfatent- Patented Apr. 25', Application filQdQct'tJbcr 2c, 1920. Serial No. 419,582, I

The form shown comprises abase10 on which the standard 11 is rotatably secured, and clamps 12 are adapted tohold the standard in its proper "adjusted position. The standard "11 provides one jaw of a clamp, it

being the'fixed element and is adapted to i have the piston ring placed against its inner face preparatory to its being cla p in P sit-ion. The other jaw of the clamp comprises a' plate 13 which is on the rearof the 1 standard 11, this plate forming the otherjaw oftheclamp, suitable means being provided:

for drawing them together and permitting them to be separated; c j

The form shown consists of a boltjl which has a head 15. on the rear end of it, and a ing it up, and thus the movable jaw of the clamp is placed against the standard. I The function of the device is to permit the rapid insertion and placing infposition .of a piston V thispistonringso that these separated ends are then clamped in .apositi-o'n in'which' they are out of alignment, the structure b61119;

suitable hand nut 16 is utilized for tighteir' I ring with its ends separated,'then clamping adapted to' permit the movementof rotaryneously, so that when the'cutting is completed one of the ends of the piston ring} hasa tongue and the otherend has a groove into cutters in contact with these endssimultaa screw 19, and a lever 20, pivoted at 21,

extends beyond the side of the standard so as to form a handle part 22 by means of 'which it canbe operated," When it is in its raisedposition the gage 17 restsagainst the edge of a ledge or 'ofi' set portion 23, the top edge 24 of which is curved for purposes to be hereinafter described and which is raised above the face 25,,immediately'below which'is a shoulder 26, the curved upper surface of which is also adapted to receive the inner face of the piston ring tobe cut, so that the part 23 is raised above the part 27, the part 27 in, turn being raised or 'o fi set above the face25'. Y 7

The plate 13 has itsrear face adaptedto against the piston ring above the, curved.

surface 24- to clamp it against the face 28, and on the other side of the gage it is provided with a projecting part, in the form shown this consis'ting'of a screw 2'9 which bears against the piston ring and pushesit over until it is pressed against the face 25, the shoulder 30 extendin over the ring to hold the ring down tightly against'the shoulder. 26. It will thus be. seen that the two ends '31 and 32 of the piston ring will not be in alignment.

The top part of the standard is provided with a slot 33 and the. plate 13 is provided with a recess hen a piston ring is to be placed in the clamp, the is raised and the piston ring, which is split with tapered ends 31 and 32, is placed on opposite sides ofthe gage 17, which has been previously slid up to the position shown in Figure 1, this gage defining the space that separates these ends circumferentially, as

will be seen from an inspection of Figure 7. I

The aw 13 is then slid over the bolt 14 and also over the stud 35, the plate 13 bemg provided with a slot 36 so that the jawcan be placed in position without entirely renuoving the bolt 14.

The nut 16 is then screwed up and the two ends of thepistonring are separated transversely by being pressed against the inner face of the. standard 11 so that-the ends of the piston ring are held in such position, that is, out of alignment'and' substantially parallel, as shown in Figure 9, as will ring so that it is provided with a tongue 41,

which will be seen from Figure 9, and a cutter 42, which is preferably provided with a rounded surface, enters the end 31 of the piston ring and provides it with a slot 43, and since the ends of the piston ring were ta ered'when thev were slit as in Fi ure 7, the piston ring when thus ground or out can have its ends Iitted'together, as shown in Figure '10, so that a unitary structureis provided, but it is made with a joint that is substantially gastight and forms a substan-:

tially complete closure when placed around the piston andwithinthe cylinder. Any

suitable mechanism for moving the cutters down'on the ring or for moving the. whole ig upward until the ring is 1n contact with p the cutter can be used.

The standard 11 can be recessed, as at 44 (see Figure 4), and the plate 13 has recesses 45 and 46, and, as will be seen from Figure The piston ring. is now,

.be made in the proportion anjdialso in the assembling of the parts without departing from the scopeot the invention.

I I claim:

1. A device for use in making piston rings comprising a clamp constructed so as to hold the ends of a split ring separated circumierentially and out of alignment, 'in combination with a set vofcutters. disposed so as to simultaneously shape said ends so that they interlock when out. j

2. A device for use in making piston rings comprising a gage for positioning the ends of a piston ring so that they are separated circumferentially,a clamp. to move said ends and hold them so that they are substantially parallel and outof alignment,said gage being supported so that it can be retreated from-its gaging position, in combination with a set of cuttersv to simultaneously out said ends so that a tongue is formedon' one and a groove on the other, the portions of the clamp adjacent said ends being recessed to receive said cutters.

3. A device. for use in making piston rlngs comprising a clamp constructed so: as to hold the ends ofa piston ring out of align ment and separated circumferenti'ally,-. one member of the clamp adjacent said ends having a slot extending adjacent to and between said ends to receive-the arbor of a cutter.

. 4. A device for use in making piston rings 3 comprising a clamp to hold a .pistonfiring with its ends separated circumterentially and transversely, and with said ends exposed for action by cutters, a gage movable in said clamp to space the ends of the ring before they are clamped and to-permit its withdrawal from gaging position, the clamp being recessed to permit the introduction of cutters between said ends.

5. A device for use in making piston rings comprising a clamp to hold a piston ring .with its ends separated circumferentially and transversely, and with saidends exposed foraction by cutters, in combination with an arbor on which a cutter for grooving one of said ends and cutters for forming a tongue. on the other of said ends are mounted. v 1

6. A device for use in making piston rings comprising a standard, a bolt in said standard, a plate with a slot to go over the. bolt to permit a transverse movementof the plate, the standard and plate forming-the jaws of a clamp, agage toposition a-piston ring between the jaws, the plate having a pro ection on one side of said gage that when the ends of the ring are clamped they are out of alignment to permit the said ends being simultaneously operated on by a set of cutters. v

7 A device for use in making piston rings comprising a standard With a slot in its top edge, a bolt passing through the standard, a

nut on the bolt, a stud on the standard, a plate having a slot to receive the .stud and the bolt and having a recessed part adjacent to the slot of the standard, a gage adapted to be projected into or Withdrawn from the space between the slotted and recessed portions, the opposedfaces of the standard and plate alongside the slot of the standard being off-set to clamp the ends of a piston ring resting against the gage so that said ends will be substantially parallel and out of alignment, whereby an arbor supplied with cutters can cut said ends simultaneously to form a tongue and groove joint on the ring, the recessed parts permitting the descent of 1 said cutters between the standard and the plate.

In testimony that I claim the, foregoing, I have hereto set myhand, this 25th day of October, 1920. 4

GEORGE SPANN. 

